Veneer-drying machine.



2 SheerS-Sheei l.

N0. 705,703. Patented July 29, |902;

- M. Hossow. VENEER DRYING MACHINE. (A pplicaton flled Nov. 4 1901.) (N0 Model.)

N0. 705,708. Patented July 29, i902.

y m. nossow. VENEER DRYING MACHINE.

(Application led Nov. 4, 1901.)

(No Model.)

2 Sheets-Sheet 2..

UNITED STATES PATENT OFFICE.

MARTIN ROSSOW, OF DESSAU, GERMANY.

VENEER-DRYING MACHINE.

SPECIFICATION forming part 0f Letters Patent NO. 705,708, dated July 29, 1902.

Application led November 4, 1901. Serial No. 81,082. (No model.)

lowing to be a full, clear, and exact descrip-l tion of the invention, such aswill enable others skilled in the art to which 4itappertains toI make and use the same, reference being had to the accompanying drawings, and to letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to veneer-drying machines, and has for its object the construction of a machine in which the veneer is fed to endless belts that carry it around heatingcylinders arranged in pairs, one or more pairs of such cylinders with their accompanying endless belts being used for the purpose. The veneer after being passedaround the one pair of heating-cylinders is automatically delivered to the next succeeding pair, thereby effecting a complete drying of the wood( These cylinders are preferably heated by steam ,and

the temperature in all ofthern may be the'l same or different, according to the`require-` ments of working.`

Referringto the drawings, `in which like parts are similarly designated, Figure 1 is a longitudinal elevation of such a machine, showing three pairs of drying-cylinders with their endless belts. Fig. 2 is a section on the line X Y of Fig. 1.

I have shown a machine having three pairs of drying-cylinders A B, A' B', and A2 B2, together with their endless belts a Z7, a' b', and a2 b2. The endless belts are arranged so that there will be an upper and a lower belt, both traveling in unison and carrying the veneer between them while passing around the two heating-drums of a pair. These belts are preferably though not necessarily metallic. Each belt is provided with a tension-roller 2, 16, and 32 for the lower series and 15, 25, and

34 for the upper series, respectively, movable to and from the cylinder near which they are located. These'tensionrollers may be of any desired construction and are here shown by way of example as mounted on sliding pillowblocks that are moved by screws, their specific construction not being embodied in the features of this invention it is believed that further description will not be necessary. The lower endless belt is arranged to project somewhat to the front of the machine, and thereby forms a receiving-table on which the fresh-cut veneer is laid. This belt a passes around roll 1, is preferably though not necessarily slightly inclined upward to roll 3, thus forming the entering or. feed table on that portion between these two rolls. The roll 3 is journaled in the frame 37 of the machine and situated close to the lower heatingdrum A of the first pair of heating-drums. At about this point it meets the upper belt l), which is next to the cylinder, and the veneer is carried between the two belts and with them around the lower heating-cylinder A, thence to the upper heating-cylinder B, both belts, with the veneer between them, leaving this cylinder at the roll 4. Both belts then travel downward and separate during their travel, the lower belt a passing over the supporting-roll 5 and the roll 6, journaled in the fframe of the machine and close to the lower heating-drumA' of thesecond pair of heaterdrums and forming the delivery end of the belt. It then passes from the roll 6 over guiderolls 7, 8, and 9 to the tension-roll 2 back tothe roll l. The upper belt l) of the first pair of heater-rolls meets the lower belgas stated, at the roll 3, travels around the lower heaterdrum A to the upper heater-drum B, roll 4, where it leaves said drum, to the roll 11, situated substantially above the roll 6 and journaled in the frame 37of the machine, at which point it is substantially free from veneer and returns around this roll to the guide-rolls 12 13 14 and tension-roll 15 to the feed end of the machine. The veneer is delivered from between the `belts at the rolls 6 and 11 to the second pair of endless belts a' b' to be carried around the two heater-drums A' B'. The upper belt b' contacts with the lower heater-drum A', being guided to said' drum by the roll 22, journaled in the frame' ofl the machine slightly in advance oi' the roll 11., so as to be free of the beltscand b. "This belt then passes around the heater-drum A' and heater-drum B', leaving said drums at the roll 17, thence to roll 23, guide-roll 24, tension-roll 25, guide-rolls 26 and 27, back to the roll 22. The lower belt a meets the upper belt below the roll G, and the delivery end of the irst pair of belts at about the roll 18, journaled below the roll 6, passes .around the heater-cylinder A', together with the upper belt, and thence with it to the upper heaterdrum B', the veneer being carried between the two belts, leaving the upper heater-drum B at the roll 17, passing over guide-roll 50 to the roll 19, which forms the delivery end oi' the endless belts, thence by guide-rolls 2O 21 and tension-roll 16 back to roll 17. This pair of endless belts deliver the veneer in a similar manner to a similar pair of endless belts a2 b2 to be carried around another pair of heater-drums A2 B2. The upper belt b2 is a short belt and contacts with the first or lower heater-drum A2, going over roll 33, journaled in the frame 37 ot' the machine and in advance of roll 23, passing around the drum A2 to the second heater-drum B2, leaving it at the roll 29, and thence by tension-roll 34, guiderolls and 36, back to roll 33. The

lower belt a2 travels over roll 28, situated somewhat below roll 19 at the delivery end of the second pair 01": endless belts, and carries the veneer between it and the upper belt b2 around the drum A2, the upper drum B2, guide-rolls 29 30 31, tension-roll 32, back t0 roll 28. This lower belt b2 forms a substantially horizontal or slightly-inclined portion between the rolls 29 and 30, which is the delivery end of the machine and from which the veneer is either taken by hand or by an automatic carrier, as may be desired. The drums are geared together in pairs by means of gears g h, 91j, k Z. The lower drums are driven from one another, and for this purpose each of the lower drums carries a chainwheel or its substitute (a belt-pulley) Z Z Z2 and are belted together by belts rm m2. The machine is driven from the delivery end in any suitable manner, here shown as a gear-wheel m, driving the last lower heater-drum A2 of the series. Power is applied to this lower heater-drum by means of the gear-wheels m fn, and motion is transmitted from this lower drum A2 to the upper drum B2 by means of gears 7c and Z, secured to the respective drums. The chain-wheel or belt-pulley Z2 transmits motion to the lower drum A' of the second pair of heater-drums by means of the chain or belt m2. This drum Al transmits motion to the upper drum B by cog-wheels t' j and by t-he chain-wheel or belt-pulley Z and belt m on the drum A', which transmits motion to chain-wheel or belt-pulley Z on the lower drum A of the first pair of heater-drums.

It will thus be seen that the veneer is fed between the belts and heated first on one side and then on the other by the rst pair ofy second p air of endless belts and also heated rst on one side and then ou the other, and in like manner delivered to a third pair of endless belts and carried around the heaterdrums, to be heated likewise iirst on one side and then on the other. Referring to Fig'. 2, I have shown one of these drums B in section, steam entering by pipe 40, connected to line-pipe 4l, and passing through one of the axles and having its exit through the other end of the-drum. Suitable cut-olf valves are provided by which any one of the drums may be cut out for repairs or other reasons.

An important feature of the invention is the location of the delivery ends of the belts with reference to the entrance to the next succeeding pair of belts, so as to insure the veneer being grasped by the latter, and this is accomplished by having the upper belt descending from above the delivery end of the upper belt preceding it and the lower belt de scending toward the drum from the delivery end of the lower preceding belt.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is

1. In a machine for drying veneer, a number of pairs of heater-drums, pairs of carrierbelts passing around both drums of a pair and carrying the veneer between them, each pair of belts arranged to deliver the veneer between the pair ot belts of the succeeding pair of drums, substantially as described.

2. In a machine for drying veneer, a number of pairs of heater-drums, pairs of carrierbelts passing around both drums ot' a pair to carry the veneer between them, each pair of belts arranged to deliver the veneer between descending portions of the next pair of belts and said drums distanced from one another to heat the veneer first on one side and then on the other during its passage through the machine. v

3. In a machine for drying veneer, a numa ber of pairs of superposed heater-drums, an upper and a lower carrier-belt to contact with each pair of drums and carry the veneer be= tweenthem, and deliver it in a downward dl= rection between downwardlytraveling por; tions of the next succeeding pair of belts at the lower one of the next succeeding pair of drums, means for driving all the lower drums and a gear on each lower and each upper drum, whereby the drums of a pair are geared 4. In a machine for drying Veneer, a num IOO ber of pairs of superposed heaterdrums, an

upper and a lower belt passing around each pair of drums, a portion of the lower carrier-4 belt of the iirst pair of drums arranged to re'- ceive the veneer before meeting the downcoming portion of the upper belt, all the pairs of carrier-belts arranged to deliver the veneer between the down coming portions of the next pair of belts, said drums distanced from one another to heat the Veneerirst on one my invention I have signed my name in presside and then on the other, means for driving ence of two subscribing witnesses. the lower drums, a gear on each of the lower drums and a gear on each upper drum driven A MARTIN ROSSOW 5 by that on the lower one of a pair of drums, Witnesses:

substantially as described. ALBERT ANDRESEN,

In testimony that I claim the foregoing as ADOLF HASMANN. 

